Finite $p$-groups of class two with a large multiple holomorph
| Autor: | Caranti, A., Tsang, Cindy |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | J. Algebra 617 (2023), 476-499 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.jalgebra.2022.11.013 |
| Popis: | Let $G$ be any group. The quotient group $T(G)$ of the multiple holomorph by the holomorph of $G$ has been investigated for various families of groups $G$. In this paper, we shall take $G$ to be a finite $p$-group of class two for any odd prime $p$, in which case $T(G)$ may be studied using certain bilinear forms. For any $n\geq 4$, we exhibit examples of $G$ of order $p^{n+{n\choose 2}}$ such that $T(G)$ contains a subgroup isomorphic to \begin{equation*} \operatorname{GL}_n(\mathbb{F}_p) \times \operatorname{GL}_{\binom{n}{2}-n}(\mathbb{F}_p).\end{equation*} For finite $p$-groups $G$, the prime factors of the order of $T(G)$ which are known so far all came from $p(p-1)$. Our examples show that the order of $T(G)$ can have other prime factors as well. In fact, we can embed any finite group into $T(G)$ for a suitable choice of $G$. Comment: 20 pages, added Definition 2.2 and a few small edits |
| Databáze: | arXiv |
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